home *** CD-ROM | disk | FTP | other *** search
- Source: Risks-Forum Digest v14n23
- Date: Tue, 5 Jan 1993 22:40:24 GMT
- From: matt@wardsgi.med.yale.edu (Matt Healy)
- Subject: Laserprinter Forgery
-
- Years ago (pre-wordprocessing) I used an IBM Selectric typewriter with a
- correction key. For a lousy typist like me, this was *wonderful*. However,
- the manual warned against using a correctable (carbon film) ribbon for typing
- legal documents because undetectable alterations would be too easy.
-
- Well, recently on a Delta flight from Hartford to Atlanta one of the options
- on the inflight sound system was an interview with Frank Abagnale, a reformed
- forger who now advises companies on fraud prevention.
-
- Abagnale said that output from most laserprinters and photocopiers can be
- removed in a similar manner with correction tape because the toner powder,
- like carbon film ribbon, only sits on the surface of the paper but does not
- impregnate the fibers. I tried it and he's right.
-
- He said some of his clients have had checks altered in this manner. He
- suggested two solutions:
-
- 1: use an impact printer with inked fabric ribbons
-
- 2: there is a fixative, similar to the stuff artists
- use to protect charcoal drawings, that can be sprayed
- over the printout, making removal of toner more difficult.
-
- Matt Healy matt@wardsgi.med.yale.edu
-
- PS: In the Selectric, IBM had the best keyboard I have ever used. Why didn't
- they use it for the PC? Closest approximation I have used recently is an old
- Leading Edge Model D.
-
- [If you wish to answer Matt's question, send mail to HIM, not to RISKS.
- By the way, the Selectric touch was fine, but the ball kept getting
- out of alignment. I have some wonderful concrete (abstract) poetry
- generated in 1969 using just such a ball. I had a real ball! PGN]
-
-